Hydro- and hydrothermal therapy are traditional methods of treatment that have been used for the treatment of disease and injury by many cultures, including those of ancient Rome, China, and Japan. Water therapy has been around for centuries. The ancient Greeks took therapeutic baths. Water is an important ingredient in the traditional Chinese and Native American healing systems.
A Bavarian monk, Father Sebastian Kneipp helped re-popularize the therapeutic use of water in the 19th century. There are now many dozens of methods of applying hydrotherapy, including baths, saunas, douches, wraps, and packs.